Earlier this month Katie informed her 1.9 million Twitter followers that Kieran had been having a "full blown sexual affair" with Jane.

After finding out about the affair, which began just weeks after Katie gave birth to their first child, nine-month-old Jett, she blasted: "No human being deserves this, especially being six months pregnant."

She later stormed round to the Pountneys' house in West Sussex – wearing tiny blue hotpants showing a garter tattoo on her thigh – to confront Jane in front of a scrum of waiting photographers.

Derek initially played down the scandal, claiming it was a "storm in a teacup" over a drunken kiss on the beach.